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Why is the power dissipated by a closed switch, such as in

College Physics | 1st Edition | ISBN: 9781938168000 | Authors: Paul Peter Urone, Roger Hinrichs ISBN: 9781938168000 42

Solution for problem 4CQ Chapter 21

College Physics | 1st Edition

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College Physics | 1st Edition | ISBN: 9781938168000 | Authors: Paul Peter Urone, Roger Hinrichs

College Physics | 1st Edition

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Problem 4CQ

Problem 4CQ

Why is the power dissipated by a closed switch, such as in Figure 21.43, small?

Step-by-Step Solution:
Step 1 of 3

Solution 4CQ

P = V2 / R

V = IR

P = (IR)2 / R

 

     =  I2 R

 the power dissipated is directly proportional to the resistance. As the switch is closed therefore the resistance has a negligible value and hence the power dissipated is small.

Step 2 of 3

Chapter 21, Problem 4CQ is Solved
Step 3 of 3

Textbook: College Physics
Edition: 1
Author: Paul Peter Urone, Roger Hinrichs
ISBN: 9781938168000

The full step-by-step solution to problem: 4CQ from chapter: 21 was answered by , our top Physics solution expert on 07/07/17, 04:39PM. College Physics was written by and is associated to the ISBN: 9781938168000. This textbook survival guide was created for the textbook: College Physics , edition: 1. This full solution covers the following key subjects: closed, dissipated, figure, power, Small. This expansive textbook survival guide covers 34 chapters, and 3125 solutions. The answer to “Why is the power dissipated by a closed switch, such as in Figure 21.43, small?” is broken down into a number of easy to follow steps, and 15 words. Since the solution to 4CQ from 21 chapter was answered, more than 822 students have viewed the full step-by-step answer.

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Why is the power dissipated by a closed switch, such as in